Power tamping-machine.



C E BATHRICK.

POWER TAMPING MACHINE. APPLICATION FILED I IIIIEBO. I909.

Patented Mar. 7, 1916.

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C. E. BATHRICK.

POWER TAMPING MACHINE.

APPLICATION FILED JUNE 30,1909.

Patented Maw, 1916 3 SHEETSSHEET 2.

C. E. BATHRICK.

POWER TAMPING MACHINE. APPLICATION FILED JUNE 30. 1909.

LTWLEGS,

Patented Mar. 7, 1916.

.3 SHEETSSHEET 3- STATES PAT OFFIQE.

' CHARLES E. BATHRICK, OF CHICAGO, ILLINOIS, ASSIGNOR T0 FREDERICK C. AUSTIN,

OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented Mar. a, 11916.

Application filed June 30, 1909. Serial No. 505,206.

To all whom it may concern:

Be it known that I, CHARLES E. BATH- RICK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Power Tamping-Machines, of which the following is a specification.

Objects of my invention are to provide a compact and generally eflicient power tamping machine particularly adapted for tamping down material used in street paving and other kindred work; to insure a quick and efiicient tamping action; to provide a power tamping machine which can be easily controlled and moved from placeto place by an attendant, and to provide certain improved details serving to increase the efliciency of the machine, and to render it extremely useful for the purposes for which it is intended.

In the accompanying drawings: Figure l is a side elevation of a power tamping machine embodying my invention. Fig. 2 is a top plan of Fig. 1. Fig. 3- is a longitudinal sectional elevation, the section being on line 3,3, in Fig. 2. Fig. i is an enlarged detail view partly in elevation. and partly in section on line 4, 4, in Fig. 3.

A indicates a truck or carriage provided withv a set of vibratory tampers B, B, B and B and an engine C for operating the tampers and also for propelling the truck. The tampers are respectively secured to the outer ends of vibratory spring arms D, D, D and D which extend longitudinally under the body frame of the truck and project beyond one end'thereof. These spring tamper arms have their inner end portions hinge-connected with the truck so as to permit them to have a suitable extent of up and down vibratory swing, the action of such arms with the tampers thereon being what may be termed a whipping action whereby the arms, which overhang the street surface or road bed, when the machine is in use, will when actuated cause the tampers to slap down upon and effectively tamp the material that is to be packed or tamped. With further reference to the spring action, each tamper arm is a flexible elastic metal bar or arm, whereby its individual spring action renders the tamping action of the tamper thereon exceedingly effective. Referring in detail to means for supporting and operating the tamper arms, E indicates pulley and each of its ends it is provided with a crank bend 3 to which a single pitman H is attached, the end bends 3 being the reverse of the middle bend 2. By this arrangementthe' middle crank portion 2 operates a pair of tampers which with relation to the set or series are between the two tampers respectively at opposite ends of the set or series, the crank portion 3 foractuating one pair being timed the reverse of the crank portion 2 for actuating the remaining pair of tamping devices. In this way suitable balance and steady operation are insured. The rotary cranked shaft G is mounted upon the body frame of the truck and driven from the transversely arranged rotary engine shaft 4 by means of a driving belt 5 connecting a pulley 6 fixed on the engine shaft with a 7 fixed on the cranked shaft G.

The truck body is wheel supported at a point between its ends and suitably balanced so that an attendant standing at one end of the truck can readily tilt the truck body about the axis of such middle supporting wheel for the purpose of depressing or elevating the range of vibratory action on the part of the tampers. While either end of the truck might be consistently termed its forward or rear end, the end of the truck from which the tamper arms project is hereinafter termed the rear end of the truck, its opposite end being therefore referred to as its forward end. The spring tamper arms which extend beyond the'rear end of the truck body, incline upwardly and rearwardly or outwardly when the truck is in normal position, that is to say-when the truck is not abnormally ported upon the middle supporting wheel or roll, and a caster wheel I at the lower end of a leg 8 on the forward end of the truck tilted from its normal position of rest in which it is supbody. The extent of vibratoryplay of the tamper arms is also such that when the truck is nottilted in direction to depress'its rear end,,the extent of down swing onthe part of the tamperfarms will notice sufiicient tobringthetamper do-wnupon the material that is on the road bed readyto be tamped.v In order however to permit the desired tamping, the truck can, be tilted in direction to depress its rear end, thereby lowering thetamping devices sufliciently to permit the tampers to impact upon the materiallaidyunder theme To facilitate. ma-

tions 9 and 10. Theseroll or roller sectionsare arranged on .a. transverse axle L which is supported at its end portionsin bracket bearings 11 depending from opposite sides: of the body frame of the. truck,

one of these bearings being shown in Figs.

land 3, and the other being be present in Figs'l'and 2. 7 I 7 I As means for propelling the truck in. either direction at will, the axle L, to which the" roll sections 9 and 10' are secured,is" provided with a sprocket'12 fixed thereon and arranged between the opposing ends of the roll sections Qand 1i). 'Thedriven sprocket 12 thus arranged on the" middle j supporting axleL is conncctedby an endless e5 drivingchain13'with a driving sprocket Li secured on a transverse rotary shaft 15 which is in turn mounted upon the truck body. The rotary shaft 15 carries a friction wheel M which is secured thereon and operated in either direction at thewill of an attendant. The device for thus actuating the friction wheel M comprises a pair of friction rolls N and N which canbe caused to engage the friction wheel M in alternation. These friction rolls N and N are mounted upon a vibratory support P which is hinged by pivot 16 to a bracket on the truck body, the arrangement being such that the sup port P can be turned so as to place the face of roll N or the face of roll N in frictional engagement with the face of wheel M. as may be desired. The hub portion of roll N is formed or provided with a gear 17, (see particularly Fig. 4), and the hub portion of roll N is provided with a like gear 18 which meshes with the gear 17. The roll N is fixed upon an axle 19 which is her P and provided at one end with a chain or link belt sprocket 2O fixed thereon. This sprocket 20 is connected by a drive chain or belt 21 with a driving sprocket 22 secured on the rotary engine shaft 4 (Fig. 2). The vibratory member P which may also be termed a bell-crank, can be adjusted in position by v18 relatively turn understood to of the shaft or pivot E supported tilting truck,

nro unted upon the vlbratory support or bearing mem-' an attendant standing atthe forward end of the truck, and to such end the bell-crank'is secured to pivotlo which is supportedfor reverseiy rotatire or oscillatory action and of crank arm 23, the upper end of bar 24 y being hinged to the rear .endof a vibratory push and pull bar or rod 25 arrangedfito slide in a'guide eye '26 on the'truck handle, K.

handle portion 27 v which can be readily T takenhold of by an attendant havinghold of the hand Theforward end of rod 25 has a portion 28 of the truck handle With the arrangement 'of' members thus describ dythe bell-crank P can be turned in a direction dependent on the direction in which vrod 25' is. longitudinally intermeshing gem-s17 and s in opposite directions, the 2 direction in whficl' axle L is turned will de-' moved and as. the

pendv On w ic one ofthe friction rolls N 2 As shown in Figs. 1 and 3, the visible bracket- 11 is provided with a rearwardly extending arm port1on29, 1n whichoneend is mounted, it being.

' and N is'in frictionalengagement with the I understood what the opposite end of the Y shaft or pivot E is mountedin a likearm,

portion of a like bracket at the opposite side of y the truck.

their arm portions 29 which the truck frame is tilted.

What I claim as my invention is:

1. In a power tamping machine, a rotary shaft provided with relatively reverse crank bends, a plurality of pitmen connected with said crank bends, a rigid arm connected with each pitman and mounted to swing on a pivotal axis, a flexible tamper arm mounted to swing about said pivotal axis and connected with said rigid arm adjacent to said axis, tamping members rigidly mounted on said flexible arms, and means for rotating said crank shaft to whip the flexible arms up and down.

2. In a power tamping machine, a wheel brackets depending therefrom, vibratory tamper arms provided with tampers, a hinged connection between the tamper arms and brackets, the tampers being sufficiently elevated to clear the ground or bed surface when the truck is in normal position, but to act upon the bed surface when the truck is tilted in direction to lower the tampers and means for driving the tamper arms upward and downward.

3. In a power tamping machine, a wheeled truck, a rotary power driven shaft provided with reverse crank bends and supported upon the rear end portion of the truck, a

I WVh'enQtherefoI-e the o truck is tilted so as te depress its rear end. portion, the bracketsll will tilt about'the axis ofaxle Land will' be lowered proportional to the extent to i set of vibratory spring tamper arms extending under and beyond the rear end portion of the truck body and having their rear outer ends provided with tampers, a shaft supported beneath the truck, the front ends of the tamper arms being pivotally mounted thereon and power transmitting connections between the spring tamper arms and the rotary crank shaft and operative to whip said tamping arms up and down.

4. In a power tamping machine, a -truck provided with tamping devices, a power supplying member on said truck, operative connections between said power supplying member and said tamping devices, and means for moving the truck, said means comprising a friction wheel mounted upon the truck, a vibratory member also supported upon the truck and provided with friction wheels having ifitermeshing gears, whereby said friction wheels can engage the friction wheel in alternation, means for driving the friction wheels on the vibratory member, a supporting wheel for the truck, a suitable power transmitting device for driving the supporting wheel fromthe friction wheel, and an adjusting device for moving the vibratory member upon which the pair of friction wheels is mounted.

5. In a tamping machine, the truck body provided with bracket bearings, an axle j ournaled in said bearings and provided with a supporting wheel, said bracket bearing having rearwardly extending arm portions, vibratory tamper arms provided with tampers and hinge-connected with the rearwardly extending arm portions of said brackets, and mechanism supported upon the truck body for whipping said tamper arms up and down.

6. In a tamping machine, the combination with a truck, brackets depending therefrom, wheels journaled within said brackets on which the truck may be tilted, to bring the machine into action, a shaft journaled within said brackets, flexible arms pivotally mounted upon said shaft and extending below the truck, each arm carrying at its outer end a rigidly mounted tamper and means for whipping the tampers up and then down.

7. In a tamping machine, the combination of a truck, an engine mounted on said truck, wheels carrying the major portion of the weight of said truck and its supported mechanism, a pivot near said wheels, flexible arms mounted on said pivot and each carrying at its outer end a rigidly mounted tamper, rigid arms also mounted on said pivot, said arms being connected with said spring arms adjacent to said pivot, and connecting means for utilizing the power of said engine in moving said rigid arms about said axis, thereby positively whipping said flexible arms downward against the surface to be tamped.

8. In a tamping machine, the combination of a truck body, an engine mounted on said body, power transmitting mechanism carried by said body and connected to transmit power from said engine, a plurality of wheels mounted near the center of gravity of said truck body, a plurality ofspring arms pivoted at one end to said truck near said wheels, each of said spring arms carrying a tamper rigidly mounted thereon, connections between said power transmitting mechanism to whip said spring arms upward and downward, and a handle whereby the operator may tilt said truck body on its supporting wheels to bring said tampers into and out of operative contact with the surface to be tamped..

9. In a power tamping machine, a truck provided with tamping devices, wheels for supporting the truck, means for rotating the wheels comprising a friction wheel mounted upon the truck, a bracket mounted upon the truck, friction wheels carried by said bracket, means for operatively connecting the friction wheels of the bracket together, means for rotating one of the friction wheels carried by the bracket, means for throwing the friction wheels carried. by the bracket into and out of engagement with the friction wheel carried by the truck whereby the truck may be moved in opposite directions and means for operating the tamping devices, substantially as described.

CHARLES E. BATHRICK.

Witnesses:

OTTILIE C. FREIBERG, CATHERINE CRAVER. 

